<!DOCTYPE html>
<html>

	<head>
		<meta http-equiv="Content-Type" content="text/html">
		<meta charset="utf-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
		<title></title>
	</head>

	<body erke-hide>
	</body>
	<script>
		/**
		 * @param {number[]} nums
		 * @return {number}
		 */
		var dominantIndex = function(nums) {
			var first=aArenDie(nums);
			nums.splice(first.index,1);
			var second=aArenDie(nums);
			if(first.value>=second.value*2){
				console.log(first.index);
				return first.index;
			}else{
				return -1;
			};
		};
		function aArenDie(arr){
			var max=0;
			for(var i in arr){
				if(max<arr[i]){
					max=arr[i];
					index=i;
				};
			};
			return {'index':index,'value':max};
		};
		var res = new dominantIndex([1,2,3,4]);
	</script>

</html>